Sending request message to server

public String getResponse(String host, int port, String requestString) {

Socket socket = null;

PrintWriter out = null;

BufferedReader in = null;

StringBuilder sb = new StringBuilder();

try {

socket = new Socket(host, port);

socket.setTcpNoDelay(true);

socket.setSoTimeout(6000);

out = new PrintWriter(socket.getOutputStream(), true);

in = new BufferedReader(new InputStreamReader(socket

.getInputStream()));

out.println(requestString);

out.flush();

String line = null;

do {

line = in.readLine();

if (line != null) {

sb.append(line);

}

} while (line == null);

} catch (Exception e) {

// handle error during sending request

} finally {

if (out != null) {

out.close();

}

if (in != null) {

try {

in.close();

} catch (IOException e) {

}

}

if (socket != null) {

try {

socket.close();

} catch (IOException e) {

}

}

}

return sb.toString();

}